Does it matter what side does the base of a triangle when finding it's area?

Yes, it does matter which side of a triangle is chosen as the base when calculating its area, as the height must correspond to that base. The area of a triangle is given by the formula ( \text{Area} = \frac{1}{2} \times \text{base} \times \text{height} ). The height is the perpendicular distance from the chosen base to the opposite vertex, so selecting different bases can yield different heights, affecting the area calculation. However, regardless of the base chosen, the area remains constant for a given triangle.